文献类型： 外文期刊
第一作者： Wu, Qihua
作者： Wu, Qihua;Zhang, Shuxiang;Zhan, Xiaoying;Xu, Minggang;Wu, Qihua;Feng, Gu;Ren, Yi
作者机构：
关键词： Agronomic critical value of Olsen P; Change in Olsen P; long-term fertilization; P application rate
期刊名称：COMMUNICATIONS IN SOIL SCIENCE AND PLANT ANALYSIS （ 影响因子：1.327； 五年影响因子：1.315 ）
ISSN： 0010-3624
年卷期： 2018 年 49 卷 8 期
页码：
收录情况： SCI
摘要： Fertilizer phosphorus (P) is generally added to agricultural soils to meet the needs of crop production. In this study, the crop yield and soil Olsen P were measured every year (5-18 years) at 16 winter wheat (Triticum aestivum L.) -maize (Zea mays L.) crop rotation sites in cinnamon soil (Luvisols in FAO system). The mean agronomic critical value of Olsen P for maize was 14.2 mg kg(-1) and for winter wheat was 14.4 mg kg(-1) when using the Liner-plateau and Mitscherlich models. The change in soil Olsen P was positively linearly correlated with the P budget (P < 0.01), and an increase of 4.70 mg kg(-1) in soil Olsen P for each 100 kg ha(-1) of P budget in the 0-20 cm soil layer. A model of P fertilizer recommendation rate that integrated values of the change in soil Olsen P in response to P budget and the agronomic critical value of Olsen P was used, in order to adjust current levels of soil Olsen P to the agronomic critical value at the experimental sites over the next 5 years, P fertilizer application rate should be in the range of 0-87.5 kg P ha(-1).
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